EP 2112541 A1 20091028 - Image pickup lens and image pickup apparatus

Title (en)

Image pickup lens and image pickup apparatus

Title (de)

Bildaufnahmelinse und Bildaufnahmevorrichtung

Title (fr)

Lentille de capture d'image et appareil de capture d'image

Publication

EP 2112541 A1 20091028 (EN)

Application

EP 09250860 A 20090326

Priority

JP 2008112607 A 20080423

Abstract (en)

An image pickup lens includes, in order from an object side, a first lens element having a positive refractive power and a convex surface facing the object side, an aperture stop adjusting the amount of light, a second lens element having a negative refractive power, a third lens element having a positive refractive power and a concave surface facing the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied, 0.6 < f ¢ 2 / f < 1.8 0 ‰¤ f ¢ 2 / R ¢ 4 < 1.7 where f denotes a focal length of an entire lens system, f2 denotes a focal length of the second lens element, and R4 denotes a curvature radius of an object-side surface of the second lens element.

IPC 8 full level

G02B 9/34 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01)

CPC (source: EP US)

G02B 9/34 (2013.01 - EP US); G02B 13/004 (2013.01 - EP US); G02B 13/18 (2013.01 - EP US)

Citation (applicant)

JP 2007155868 A 20070621 - SONY CORP
JP 2005292559 A 20051020 - SONY CORP

Citation (search report)

[X] US 2008043343 A1 20080221 - CHEN CHUN SHAN [TW], et al
[A] EP 1898244 A1 20080312 - MILESTONE CO LTD [JP], et al
[A] EP 1804101 A1 20070704 - MILESTONE CO LTD [JP]
[A] EP 1909130 A1 20080409 - KONICA MINOLTA OPTO INC [JP]

Citation (examination)

EP 1821129 A1 20070822 - FUJINON CORP [JP]

Designated contracting state (EPC)

DE FR GB

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2112541 A1 20091028; CN 101566722 A 20091028; CN 101566722 B 20120321; JP 2009265245 A 20091112; JP 4505765 B2 20100721; US 2009268312 A1 20091029; US 7995292 B2 20110809

DOCDB simple family (application)

EP 09250860 A 20090326; CN 200910135411 A 20090423; JP 2008112607 A 20080423; US 38524109 A 20090402